Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c7d88f48ae85ead…

MALICIOUS

PDF

98.7 KB Created: 2021-07-16 22:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44d1ff34f1363f1c0240cf2fe375cf8b SHA-1: 0fa7a79b5e8efc0f6566d6030d0dc4aa35e74156 SHA-256: 4c7d88f48ae85ead9a33b5a13becb7296d25324ac12bee319a57f96bb7c451e1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URL, although flagged as benign, suggests a phishing or social engineering attempt. The PDF structure and heuristics point towards a phishing lure, likely intended to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/CHqDoFjlE84/square?utm_term=cultural+barriers+to+communication
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edeee4a4137771ba03dadd/1626205924262/fotamefa.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7d2286e46386ca3c02d6e/1625805352793/approximation_in_a_sentence.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc09fa9aa746350c8aa26/1626194079714/53503406589.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca6e21cff58014d573db7/1626121954635/67124231588.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9083737cb9044755eff2d/1625884727629/12614732980.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8cfbac4ce500af8448145/1625870266359/92118694277.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91d06fc46b1505827f4e1/1625890054709/funny_philosophical_quotes.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edb07b03cb9e0b597ae7e4/1626189947850/42349974015.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edf1842e8a4a2aca7c1acd/1626206596173/luzibopukidirutaxeso.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed96705dd1eb1c29060297/1626183280742/85616245295.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8df182f3c4128e186ae80/1625874200570/lowenivevazab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001212f.bin
5dae4cff2f9170aa5c8cf20e6d2756a1c5b9b537274bb7c9bd96ef953407c237
pdf-font-stream PDF embedded font (sfnt) at offset 0x1212F 17084 bytes
font_01_sfnt_off00014dcc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCC 16792 bytes
font_02_sfnt_off000165e3.bin
5ca6106f5ea99978f871d0e8c63c1867a2a76ee1e5dd8e34306a2695903be824
pdf-font-stream PDF embedded font (sfnt) at offset 0x165E3 10664 bytes